Standard No.:	GB/T 30799-2014
English Name:	The test method of food detergents-Determination of heavy metals
Chinese Name:	食品用洗涤剂试验方法 重金属的测定
Chinese Classification:	Y40    Daily use chemicals in general
Professional Classification:	GB    National Standard
ICS Classification:	71.100.40 71.100.40    Surface active agents 71.100.40
Issued by:	AQSIQ; SAC
Issued on:	2014-07-08
Implemented on:	2014-11-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	100.00
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The test method of food detergents - Determination of heavy metals



1 Scope



This standard specifies the test method for determination of heavy metals in food detergents.



This standard is applicable to the determination of heavy metals (by Pb) in both food detergents and non-food detergents.



2 Normative references



The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.



GB/T 6682 Water for analytical laboratory use - Specification and test methods



3 Principle



Under weakly acidic conditions (pH=3~4), conduct the limit test by comparing the specimen in which the heavy metal ions react with hydrogen sulfide to generate a brownish-black substance with the lead (Pb) standard solution treated with the same method.



4 Reagents



Unless otherwise stated, only recognized analytically pure reagents and Grade III water as specified in GB/T 6682 shall be used in the analysis.



4.1 Hydrochloric acid.



4.2 Hydrochloric acid, c(HCl)=6mol/L: Measure 50mL hydrochloric acid and dilute it with water to 100mL.

Foreword i
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Instruments
6 Pretreatment of specimen
7 Determination